simponic/tabloid-fake-closure
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Add support for exprgroups guraded by parens

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This commit is contained in:
Linus Lee 2020-09-24 07:55:24 -04:00
parent 6c67ca1a04
commit 528eb9c74d
1 changed files with 11 additions and 1 deletions
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12
static/js/lang.js
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@ -414,6 +414,17 @@ class Parser {
type: N.ExprGroup,
exprs: exprs,
};
} else if (next === T.LParen) {
// block, but guarded by parens, for binary exprs
const exprs = [];
while (this.tokens.hasNext() && this.tokens.peek() !== T.RParen) {
exprs.push(this.expr());
}
this.tokens.expect(T.RParen);
return {
type: N.ExprGroup,
exprs: exprs,
};
}
throw new Error(`Parsing error: expected ident, literal, or block, got ${
@ -471,7 +482,6 @@ class Parser {
const atom = this.atom();
if (BINARY_OPS.includes(this.tokens.peek())) {
// infix binary ops
// TODO: support operator precedence
const left = atom;
const op = this.tokens.next();
const right = this.atom();